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Section note: This section introduce the notion of subnets, internet gateway and routing

Explain subnets and CIDR
Create a new subnet
Explain the routing
Explain and create IG
Route
Spin up EC2 and tests the overall thingy

Ext article/inspiration https://medium.com/@hobballah.yasser/secure-access-to-private-ec2-instance-in-private-subnet-methods-and-best-practices-d4ee75a506d3#a51e

https://medium.com/@gouravmishra624/how-to-securely-upgrade-software-on-ec2-instances-in-a-private-subnet-a-practical-guide-ab070057e202

So far we have seen that:

A VPC is a range of IPs dedicated to only your resources.
A VPC is tied to a specific region.
A VPC on its own is not enough for a resource to be able to get an IP address.

For an EC2 instance to be able to be given an IP address you will need to split your VPC into separates blocks tied to Availability Zones called Subnets.

In this section we will see how to setup your first subnet with internet access and spin up a EC2 instance in it.

By the end of this section you will have this:

Part1_IG.drawio.png

Step 1 create a VPC and your first subnet with an EC2 machine

Create a new VPC

Create a new subnet

CIDR in depth

https://mxtoolbox.com/SubnetCalculator.aspx https://cidr.xyz

https://www.youtube.com/watch?v=KiWXRL-2TnY

Create a new EC2 instance (link to previous week)

Step 2 Create an Internet Gateway

Step 3 Update the routing table

Sum up

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Week 4